If it were me (and it was) I'd get the grounding kit, put on
a "Z" intake tube and K&N Filter with the Crawford. If you're only doing one - Do the Crawford. The others are much less expensive, so the money will come sooner to do 'em. The dealer would make the call on warranty, but it very well may void it. You can always appeal to Customer Service, but they usually back the dealer. Any mod if left on when the car is serviced has the potential to void the warranty however.

Lou